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备孕准爸妈要学会科学预测排卵期

发布日期:2024-07-03 10:02:21编辑:秩名


(1)推算法

 
排卵期第一天=最短一次月经周期天数-18天排卵期最后一天=最长一次月经周期天数-11天
 
推算方式:如果通过观察,月经很规律,28天一次,那么你可将月经周期的最长天数和最短天数均定为28天,代入公式,可计算出你的“排卵期”为:本次月经来潮后的第10~17天。此种计算方法是以本次月经来潮第1天为基点,向后顺算天数,而不是以下次月经来潮为基点,倒算天数,因此不易弄错。找出“排卵期”后,如果想怀孕,可从“排卵期”第1天开始,每隔1日性交1次,连续数月,极有可能怀孕。如不想怀孕,就要错过“排卵期”过性生活。由于排卵期会受疾病、情绪、环境及药物的影响而发生改变,须和其他方法结合使用。
 

(2)测量基础体温

 
基础体温是指经过6~8小时的睡眠以后,体温尚未受到运动、饮食或情绪变化影响时所测出的体温。通过记录基础体温可以推算出排卵日。
 
正常情况下,育龄女性排卵前基础体温逐渐下降,相对较低,保持在36.4~36.6℃;排卵后基础体温升高,一般上升0.3~0.5℃,持续3天。从排卵前3天到排卵后1天,这段时间为容易受孕期,可作为受孕计划的参考。
 
每天在睡觉前将体温计甩到35℃以下,并放在床头安全的地方,第二天一醒来不要做任何活动,立即测量体温,因为任何动作都可能使体温升高而产生误差,所以必须在不活动的情况下完成测量。至少需要连续测量和记录3个月,画出曲线图,以便掌握体温上升、下降的规律,来确定自己的排卵日。
 

测基础体温要注意

 
早晨量体温有困难者,可在每天某一固定时间里测量体温,切记测量前半小时不可激烈运动或饮用冷热食物。
 
测量基础体温的方法虽然简单,但要求严格,还需要长期坚持。一般需要连续测量3个以上月经周期才能说明问题。
 
在月经期,如遇有感冒、发热、腹泻、失眠、饮酒、使用电热毯等情况,往往容易影响基础体温,在测量时要注意,同时要特别标记说明。
 
一定要记录下每天的基础体温,如果某天忘记测量了,可以根据之前的记录作出大致推断,不过不可有偷懒思想和侥幸心理,否则所作记录就会因为不准确而失去意义。
 

制作自己的基础体温表

 
①横坐标是日期,每天一格,共35格,如果你的月经周期比较长,可以多做5~10个格子。
 
②纵坐标是体温,可以从35.5℃开始,由下向上逐渐升高,每0.1℃升高一格,最高到39℃就足够了。
 
③在横坐标的最下面,多留出一点空白做备注,用来记录相应日子发生过的对体温有影响的事件,如饮酒、感冒、紧张、熬夜、用药等,同时房事要用标记标出。
 
④每天早上醒来,在尚未进行任何活动前测量体温,标记在记录表上,并描成温度变化曲线即成基础体温曲线。把体温计含入口中,至少5分钟,取出体温表观察温度,并在表格内相应位置做上标记。
 
⑤一般于月经周期第5天开始测量记录体温。
 

(3)观察宫颈黏液

 
根据阴道黏液变化判断排卵日,女性月经周期分为“干燥期—湿润期—干燥期”,在月经中间的湿润期,白带较多而且异常稀薄,一般持续3~5天。观察阴道分泌物像蛋清样,清澈、透明、高弹性、拉丝长,这一天就是排卵。
 
月经干净后,宫颈黏液常稠厚而量少,称为干燥期,提示非排卵期。月经周期中期,黏液增多而稀薄,阴道分泌物增多,称为湿润期。接近排卵期时。黏液变得清亮滑润而富有弹性,如同鸡蛋清状,拉丝度高,不易拉断,出现这种黏液最后一天的前后48小时之间是排卵日,在出现阴部湿润感时即排卵期,也称为易孕期。计划受孕应选择在排卵期前的湿润期。
 
应用要点
 
①观察宫颈黏液,每天需要数次,一般可利用起床后、洗澡前或小便前的机会用手指从阴道口取黏液,观察手指上的黏液外观、黏稠程度以及用手指做拉丝测试等几方面检查。
 
②重点观察黏液从黏稠变稀的趋势,一旦黏液能拉丝达数厘米时,就应认为处于易受孕期(排卵期)。
 
③宫颈黏液法也适用于月经不规律的女性掌握自己的排卵期。
 
注意事项
 
①观察宫颈黏液前,一定要将手洗干净。
 
②以前一天晚上没有同房时,观察的结果比较准确。
 
③对宫颈黏液的观察需要经验,应进行2~3个月的练习才能判断得比较准确。
 
④阴道内宫颈黏液的变化受多种因素影响,如阴道内严重感染、阴道冲洗、性兴奋时的阴道分泌物、性交后黏液、使用阴道内杀精子药物等。
 
⑤判定白带性状时要与各种阴道炎引起的病理性白带增多相区别,后者白带可呈黄脓状、块状、黄色肥皂水样,常有臭味,还可伴外阴奇痒等症状,需去医院就诊治疗。
 

(4)用排卵预测试纸测试

 
首先确定通常的月经周期,即从每次月经的第1天到下次月经的第1天的天数,从月经周期第11天开始测试,每天一次。可以进行家庭自测,以便安排家庭生育计划,择期怀孕。
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